Animal limbs and support

Draw a water strider in Aquarell: six legs with four principal water supports

Distinguish short forelegs from long middle and hind legs, checking four surface contacts, dimples and reflection.

English translation of the Chinese original, translated on . Original publication dates, attribution, code and version notes are retained.

A water strider is neither a four-legged insect nor an insect with six equally long legs evenly planted on water. Draw one simplified animal resting on calm water: short forelegs near the head and long middle and hind pairs forming four principal supports. Check the six-leg body plan separately from surface dimples, then add restrained reflection for lightness. Draw everything manually in Aquarell without fluid simulation or treating illustrated dimples as force measurements.

Establish body regions and direction from above

Use an approximately 1800×1500 px landscape canvas with muted blue-green water. Point the head upper left and abdomen tip lower right. Establish a slender body, slightly broader in the middle with a smaller head, rather than a thick cigar. Separate sketch, six legs, body, surface marks and reflection. Keep the body near one third of image length, leaving room for long legs; this is composition, not real size. Clarify head and short forelegs if direction is ambiguous, omitting wing texture for now. Avoid dense waves that bury contacts; lightness begins with body and leg placement.

Count a short front pair and two long pairs

Locate three leg pairs near the thorax: short forelegs bending beside the head, long middle legs spreading laterally and long hind legs extending back and outward. Label fore, middle and hind centrelines temporarily, without counting abdominal markings as a seventh leg. Occlusion is allowed, but account for six connected paths. A four-legged water spider usually indicates missing forelegs; six equal spokes call for shorter forelegs and distinct middle/hind directions. This resting pose does not force the forelegs into the same supporting role as the four long legs. Symmetry must not erase functional differences.

Locate four long-leg surface contacts

Choose principal support regions for left/right middle and left/right hind legs, all on one water plane rather than a far contact floating above the body. Mark faint small ellipses and lead each leg toward its region. The four locations need not form a perfect rectangle but should surround the body readably. Reduce steep underwater-pointing ends if legs resemble needles piercing the surface, retaining slender near-surface directions. These simplified regions are diagnostic markers, not exact pressure distributions. Replace obvious positioning circles with readable leg-to-water relations in the finish.

Suggest dimples with subtle darks and light rims

At each principal contact add a flattened pale grey-blue dark and a narrow lit arc. Keep it on the water plane, narrowing distant marks, rather than four glass beads above water. Solve one dimple and inspect it small, then repeat the logic. Lighten and soften black holes; remove tall white spikes that resemble splashes. Reflections may interrupt dimple edges, so complete rings are unnecessary. Do not give short forelegs identical marks that visually reassign all six legs to the same principal supporting role.

Keep legs slender and continuous

Use dark grey-brown legs, clearer at roots and quieter on fine distant sections. Explain bends through direction rather than bead-thick joints. Give the body warm-grey upper-left light and deep-brown lower-right shade, only moderately stronger than water. Hide surface marks and trace each leg for gaps or accidental joins. Reduce equal black widths and hard bright edges if scaffold-like. Recover key connections locally rather than thickening all six legs. A tiny dark eye may indicate direction without overwhelming the short forelegs or prompting invented long tentacles.

Keep reflection distinguishable from the animal

Place a small cooler, softer body reflection underneath and only a few broken leg-reflection cues rather than duplicating six dark legs. Dimples belong around contacts; reflection is an image of the animal, even where they lie close. If twelve legs appear, soften and lighten reflected edges, then recount six real legs. Upper-left lighting does not require one bright water streak per leg. Reflections may omit fine lines, but the body sketch must still account for every leg. Test this at reduced size rather than relying only on magnified detail.

Audit six legs separately from four supports

Keep a reflection-free structural version. Count six legs in three pairs, then four principal support regions belonging to the two long pairs. These audits are not interchangeable: correct dimples can coexist with missing forelegs. Hide the body to confirm roots near the thorax rather than a row along the abdomen. Mark an occluded support in the diagnostic sketch and show only its visible part in the finish instead of breaking a leg to expose it. Adjust one endpoint and its dimple at a time while holding the water plane fixed, separating length, contact and shadow causes of apparent floating.

Retain subtle dimples rather than black pads

Save the layered work and inspect the PNG at use size for light dimples and identifiable short forelegs. If dimples become black pads, lower darkness and break selected edges rather than brightening the animal. Recover lost long legs with local water/leg colour separation. Record a definite join such as right-hind tip merging with reflection for direct repair. A rowing pose needs fresh reliable reference rather than converting stationary contacts into speed lines. This simplified resting pose uses sourced leg roles and four principal supports; palette and pixel proportions are drawing suggestions.

Paint a dragonfly in Aquarell: show direction and transparency in four wings; Paint underwater koi in Aquarell: separate body, markings and surface.

Sources checked on 8 November 2026: the official Aquarell App Store listing and Apple Lookup show version 1.0.7, requiring iOS / iPadOS 15.0 or later. The drawing uses the publicly described brush, colour, layer and saving capabilities manually. Sizes, shapes and colours are practice suggestions; confirm controls against the installed version. Keep the native artwork for further editing and use PNG for previews. This batch does not claim step-by-step device testing.

Natural-history reference: the Hong Kong Wetland Park educational resource distinguishes short forelegs from long middle and hind legs. Accordingly, four principal surface supports do not mean four legs, and forelegs are not drawn as equally long supports.